The key here is making sure you DO NOT power the thing up all ALL for a few days, a week or longer is best, but id say after 2 days of drying it should be good… Its going to need to be heated up a good bit and held there for a while to dry out. The thing could still work fine, just make sure the battery is out, open any little ‘doors’ it may have, possibly put it on a cookie sheet and put it in the oven at like 150 or so? Or just take a hair dryer to it for like 30 mins…
Make dam sure its dry before you try using it again…